Honeywell HMC6042 User Manual

2-Axis Magnetic Sensor Circuit
HMC6042

The Honeywell HMC6042 is a surface mount multi-chip module designed
for low field magnetic sensing such as low cost compassing and
magnetometry. The HMC6042 includes our state of the art 1042 series
magneto-resistive sensors plus a precision mixed signal ASIC containing
three sensor amplifiers and a compatible set/reset strap driver circuit for 2.4
to 3.6 volt operation. The ASIC plus sensors are surface mount packaged in
a 3.6 by 5.0 by 1.0mm LCC that can be used stand alone for very low cost
2-axis compasses, or with the HMC1041Z to complete the magnetic sensor
portion of a 3-axis, tilt compensated compass. Applications for the
HMC6042 include Consumer Electronic Compassing and Magnetometry.

The HMC6042 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other
magnetic sensor technologies. The sensors feature precision in-axis sensitivity and linearity, solid-state construction with
very low cross-axis sensitivity designed to measure both direction and magnitude of Earth’s magnetic fields, from tens of
micro-gauss to 6 gauss. Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field sensors in the

Advanced Information

industry.

Honeywell continues to maintain product excellence and performance by introducing innovative solid-state magnetic
sensor solutions. These are highly reliable, top performance products that are delivered when promised. Honeywell’s
magnetic sensor solutions provide real solutions you can count on.

FEATURES BENEFITS

2-Axis Magnetoresistive Sensor and

4

ASIC in a Single Package
Low Cost

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5 x 3.6 x 1.0mm LCC Surface Mount

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Package
Low Voltage Operations (2.4 to 3.6V)

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Built-In Set/Reset Drive Circuit

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Signal Processing Flexibility

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Lead Free Package Construction

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Wide Magnetic Field Range (+/-6 Oe)

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Available in Tape & Reel Packaging

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Small Size for Highly Integrated Products. Just Add a Micro-

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Controller Interface with ADC, Plus Two External SMT Capacitors
Designed for High Volume, Cost Sensitive OEM Designs

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Easy to Assemble & Compatible with High Speed SMT Assembly

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Compatible for Battery Powered Applications

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Single Logic Input for Degaussing, Thermal Drift Compensation

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Feedback Pins for Gain and Bandwidth Shaping

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Complies with Current Environmental Standards

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Sensors Can Be Used in Strong Magnetic Field Environments

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High Volume OEM Assembly

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HMC6042

SPECIFICATIONS

Characteristics Conditions* Min Typ Max Units

System
Sensitivity Open Loop Gain, After Set/Reset Pulses 175 275 mV/V/gauss

Zero Field Offset VDD1 = 3.0 volts 0.75 1.5 2.25 volts
Magnetic Field Range Full Scale ±1 ±2 gauss

Power Supply

Supply Voltage VDD1, VDD2 Referenced to GND 2.4 3.0 3.6 Volts
Current

Magnetic sensors

Bridge Current = 0.9mA/volt per axis

Continuous (VDD1)

Peak (0.5msec) (VDD1 + VDD2)

5.2

7.0

mA

25

Field Range Full scale (FS) – total applied field -6 +6 gauss
Sensitivity After Set/Reset Pulses 0.8 1.0 1.25 mV/V/gauss
Resolution 1 kHz bandwidth, VDD1 = 3.0 volts 0.12 milli-gauss (RMS)
Bridge Offset

Offset = (OUT+) – (OUT-)

-1.25 ±0.5 +1.25 mV/V

Field = 0 gauss after Set pulse

Cross-Axis Sensitivity

Cross field = 0.5 gauss,

±0.2% %FS/gauss

Happlied = ±3 gauss

Disturbing Field

Sensitivity starts to degrade.

20 gauss

Use S/R pulse to restore sensitivity.
Max. Exposed Field No perming effect on zero reading 10000 gauss
Sensitivity Tempco TA= -40 to 125°C, Vbridge=5V -3500 -3100 -2000 ppm/°C
Bridge Offset Tempco TA= -40 to 125°C, No Set/Reset

T

= -40 to 125°C, With Set/Reset

A

±500

±10

ppm/°C

Bridge Ohmic Tempco VDD1 = 3.0V, TA = -40 to 125°C 2100 2500 2900 ppm/°C
Linearity Error

Best fit straight line

± 1 gauss
± 3 gauss
± 6 gauss

0.17

0.42

0.80

%FS

Hysteresis Error 3 sweeps across ±3 gauss 0.15 %FS
Repeatability Error 3 sweeps across ±3 gauss 0.11 %FS
ASIC
Amplifier Gains No Feedback Connections 225 V/V
Bandwidth 10 kHz
Slew Rate 0.1

V/µsec
Gain Bainwidth Av = 250 1.0 MHz
Phase Margin Av = 250 45 deg
Output Voltage Range VDD1 = 3.0V 0.15 2.85 V
Output Current

Source

Sink

Set/Reset Strap Driver

Reservior Cap C1 Recommended Capacitor Size 2.2 4.4 10

3.6

3.6

mA

µF

Load Road Range Includes Internal 1042 S/R Strap 1.5 6 ohms
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HMC6042

Characteristics Conditions* Min Typ Max Units

Internal Strap Resistance 3 6 ohms

Other

Operating Temperature Ambient -40 125 °C
Storage Temperature Ambient, unbiased -55 125 °C
Weight TBD milli-grams

* Tested at 25°C except stated otherwise.

PIN CONFIGURATIONS

(Arrow indicates direction of applied field that generates a positive output voltage after a SET pulse.)

S/R-

IN Z+

S/R-

IN Z+

IN Z-

IN Z-

C1

C1

S/R C

S/R C

S/R IN

S/R IN

56 7 8910

HMC6042

HMC6042

56 7 8910

4

4

S/R+ FB Z

S/R+ FB Z

OFF-

OFF-

3

3

2

2

NC

NC

1

1

VDD1

VDD1

Y

Y

AMR DIE

AMR DIE

X

X

ASIC

ASIC

DIE

DIE

11

11

12

12

OUT Z

OUT Z

13

13

FB Y

FB Y

14

14

OUT Y

OUT Y

151617181920

OFF+

OFF+

NC

NC

VDD2

GND

VDD2

GND

OUT X

OUT X

151617181920

FB X

FB X

BOTTOM VIEW

BOTTOM VIEW

Pin Number Function

1 VDD1
2 NC
3 Offset Strap­4 Set/Reset+
5 Set/Reset­6 Z sensor In+
7 Z sensor In­8 C1, reservoir cap

9 Set/Reset drive out
10 Set/Reset logic input
11 Z amp feedback
12 Z amp output
13 Y amp feedback
14 Y amp output
15 X amp feedback
16 X amp output
17 GND, ground return
18 VDD2
19 NC
20 Offset Strap+

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